Abstract: A method for detoxifying spent CCA (copper, chromium, arsenic) treated wood, from which CCA is efficiently removed from the wood, allowing both the CCA and the wood to be reused has been developed. The method comprises the steps of (1) microwave-enhanced acid extraction of CCA, (2) separation of the acid-containing CCA solution from the wood, (3) separation/precipitation of CCA from the acid extract, (4) recovery and regeneration of CCA-bearing precipitant for reuse in the wood preservation industry, (5) recycling recovered acid solution, (6) microwave-assisted liquefaction of the extracted wood, and (7) use of detoxified liquefied wood to form polymeric materials such as polyurethanes and phenolic resin adhesives. The recovered CCA may be used to treat wood. The recovered acids may be used to extract CCA from CCA-treated wood, and the liquefied wood may be used as phenolic or polyurethane resins.
Type:
Grant
Filed:
July 15, 2010
Date of Patent:
October 25, 2011
Assignee:
Board of Supervisors of Louisiana State University and Agricultural and Mechanical College LSU Inc
Inventors:
Chung-Yun Hse, Todd Finley Shupe, Bin Yu, Hui Pan
Abstract: A new variety of sweetpotato identified as ‘Bonita’ is disclosed as having disease resistance to both southern root-knot nematode and soil rot, a white flesh, a high dry matter content, and high yield characteristics.
Type:
Grant
Filed:
October 4, 2010
Date of Patent:
May 8, 2012
Inventors:
Don R. LaBonte, Arthur Q. Villordon, Tara Smith, Christopher A. Clark